Galvanizing apparatus.



A NIEDRINGHAUS GALVANIZING APPARATUS. unieuro! man un. 11', 1909.

943,315. Patented 1360.14,

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inventor: ledmghaus l Wag/MUY.

Ale am er N 6 ,D www mm. t.

A. NIEDRINGHAUS.

GALVANIZING APPARATUS.

APPLIoATIoN FILED 111111.11, 1909.

Patented Dec. 14, 1909.

3 SHEETS--SHEET 2.

Qhaua Alaxandr Nladrm 1^ A A n A A. NIEDRINGHAUS. GALVANIZING APPARATUS. APPLICATION FILED 1.111.11, 1909.

Patented Dec. 14, 1909.

3 SHEETS-SHEET 3.

mentor: n er, Niedrnghaus WY Ale 9 i Witnasees QA/( frequently renewed.

box into position. the lower open end otl the ALEXANDER NIEDRINGHAUS. OF ST. LOUIS, MISSOURI.

GALVANIZING APPARATUS.

Specification of Letters Patent.

'rm-.enter Dee. la, tooo.

Application led March 11, 1909. Serial No. 482,769.

To all whom it lmay concern:

Be it known that I, ALExANnER Ninnmxo HAUS, a citizen ot' the United States, residingl at St. Louis, Missouri, have invented a certain new and useful Improvement in (lalvanizing Apparatus. ot which the following is a t'ull, clear, and exact description. such as will enable others skilled in the art to which it appertains to make and use the same. reference being had to the accompanying drawings, forming part. ot' this specitication. in which- Figure 1 is a longitudinal sectional view through my .improved galvanizing apparatus. Fig. 1s a top plan view ot' the same. Fig. 3 a detailed View of a flux box. Fig. Ll is a. vertical cross-sectional view through `said tlux box. Fig. 5 is a detail view ot the galvanizing box. Fig. G is a vertical crossseetioual view through said galvanizing box. Figs. T and 8 are sectional views ot' moditied forms of boxes. Fig. 9 is another modilied form of box.

This invention relates to a new and uset'nl im )rovement in galvanizine a i niratus.

In the oalvanizine` ot' )lates where molten l lead is used in the bath. a linx box is also used, through which tlux box the sheet to bc galvanized is passed prior to its introduction into the molten lead bath. Great ditticulty has been experienced in the use ot these g tlux boxes because the metal ot wlnch they are composed burns ont at the lower portion, or is eaten away so that spelterl and dross enter and the tlux escapes into the kettle. The boxes. therefore. have to be ln introducinea new box will trap a quantity of spetter and dross. which in practice has had to be ladled out after the, box was submerged in position. It. has been found to be impossible. however. to ladle out all ot the speltcr and dross. The. object ot the llux box in ex` cluding the spelter and dross is to enable the sheet. alter passing through the l'lux box. to be tirst treated in the lead bath where it` is heated to the proper temperature and thus made in readiness to receive the coating ot Zine which more readily adheres to the heated plate. and the plate being of an even temperature thrtnighout. will partake of an 'even coating otl zinc.

l My invention consists in the provision ot l ineaus in the linx box to exclude spetter and i dross in submerging or partially submergl ing the linx box into position. ythis means. l in the form ot' a plug or stopper in the lower end of'the flux box. may be metallic lead. l which will melt after its introduction and become part ot the molten lead bath: or said plug may be wood and be burned away. in this manner being destructible; or said plug may be of plaster ot paris or some other material which is capable otl being broken into small particles. The galvanizing box at the dischargey end ot' the kettle is likewise provided with a fusible. destructible or breakable plug, so that when it. is subincrged the dross will be excluded.

l indicates the walls ot the kettle or tank. around which is a space 2 for the fuel. said tue/1 burning between the walls l and brick walls il.

l and 5 are the feed rolls between which the sheets pass in entering the kettle. said sheets striking deecting linger and being f guided down into and through the linx box T. This flux box. as shown in Figs. il and el. is made ot' sheet metal and suspended t'rom the Yalls of thel tank. The box is open at its top and bottom, the upper end project ing above the surfaceI ot the molten .spelter e and the lower end of the box projecting bellow the surface ot the molten lead bath. ln this box is arranged the lluxing mate-rial l through which the sheet to be galvanized l passes on its way to the molten lead bath. I which molten lead bath heats the sheet preparatory to its contact with the molten zinc. which latter material adheres to thc surt'ace of the sheet. 'forming a skin or coat thereon. the sheet passing through squeezing rollers o and E) as it issues `trom the kettle. llcyond the kettle the .sheet is bent over by guide fingers l0 on to the convevei chain ll. on which chain it is permitted to cool.

Y lt is tluite important at the. linishingstage to have the dross excluded trom the galvanizing box. and the galvaniziug box there tore bridges the dross. its lower end heilig submerged in the molten lead bath and its upper end terminating under the. rollers tl and E) below the upper surl'acc ol the speltcr bath. The .spelter bath can thu.s ovcrllow l into the galvanizing box and keep it lilled at all times. The dross is an objectionable element in galvanizing. These substances may be impurities in the spelter which drop to the bottom, or impurities in the lead which flow to the top.

As the spelter is used, it is replenished by adding speltei, which melts and overflows into the galvanizing box. The lead, of course, may be i'epleiiislied in the same way by adding metallic lead when needed. The dross may accumulate and lill up between the lead and spelter to the top of the galvanizing box 1Q, the box 12 excluding the dross troni the sheets. Should the dross get on the sheet it will leave lumps, which are objectionable. As the dross builds up, it is referable to remove it by ladling it out, or it can be piled in the center until convenient to remove it so as to float upon the surface of the lead between the flux and galvanizing boxes. I have used the term galvanizing box in referring to the box 12, for tliereason that it is within this box that the sheet to be galvanized receives its coating of Zinc or spelter.

13 represent guiding bars which guide the plate to be galvanized through the molten lead bath. In some kettles rollers are used.

Referring to Fig. et, 141 is a plug in the lower end of the tlux box 7. This plug is preferably metallic lead, which is held in position by suspending rods 15; or the walls of the box 7 may be grooved, as shown in Fig. 8 and thel plug 14:at cast therein; or the lower walls of the box 7 may be bent inwardly and the plug 149 supported in position by these inwardly bent walls; the plug may be of wood, plaster of paris, or in fact any material which will exclude spelter and dross upon the introduction of the flux box into position. In preparing the iux box to be introduced into position in the kettle, the plug is arranged in place, and the box placed in the kettle. If the plug is of metallic lead it will, upon comingl in contact with the molten lead, melt and permit the passage of its sheet to the box. If the plug is of wood it may be burned away, the ashes not being objectionable. It the plug is of plaster of paris it may be broken, and particles will float on the surface of the lead. The socalled galvanizing box 1Q is provided with a plug 15 in its bottom for the same purpose, and this plug may be made of any suitable material, and be held iii place in an appropriate way. I have shown iii wardly extending lugs 16 in the drawing, around which the metal constituting plug 15 is cast.

Instead of using a plug at the bottom of the box, I may arrange a removable stopper, or a hinged door or valve which can be taken away, or opened, as the case may be, after the box is submerged in the molten metal.

This is illustrated in Fig. 9 wherein 14C indicates a hinged door or panel having a wire connected to its free edge,'wliereby when the box is inserted in position the door may be opened and held open. My invention is, therefore, not limited to a vanishing plug such, for instance, as metal which will melt. or wood which will burn away, or a destructible plug sucli as plaster of paris, which can be broken. It is obvious that it possible in the introduction of the guide fingers 13, to house in said fingers, and the parts to which they are connected, with lead or other material to exclude the dross during the time that the guide bars are being introduced into position, which dross might accumulate thereon'and come in contact with the sheets passing iuider the guide bar.

IVliile I have illustrated-in the drawings, and described in these specifications, the use of molten lead iii the bath, it is obvious that the molten lead can be left out and thatmy improvements can be used in connection with spelter baths where no lead is present, to exclude the floating impurities.

I am aware that changes in the construction and arrangement of the several parts of my device can be made and substituted without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim is:

1. In a galvanizing apparatus, a flux box having a plug in its bottom, which plug will exclude substances floating on top of the lead bath during the time that the flux box is being introduced into position.

In a galvanizing apparatus, a flux box having a fusible plug in its bottom.

3. In a galvaiiizing apparatus, a flux box having a destructible plug in its bottom.

4. In a galvanizing apparatus, a galvanizing box having a plug in its bottom, which plug will exclude particles floating on the surface of the molten lead during its introduction into position.

5. In a galvanizing apparatus, a galvaniziiig box having a. fusible plug in its bottom.

6. In a galvanizing apparatus, a galvanizing box having a destriictible plug in its bottom.

7. In a galvanizing apparatus, an openended box having a metallic lead plug in its lower end, which will fuse with the molten lead bath after its introduction into position. y

8. In a galvanizing apparatus. an openended box provided with a movable closure for its lower end which will exclude superposed strata diii'ing the introduction of the box into position in the molten bath.

9. In a galvaniziiig apparatus,l an openeiided box provided with a vanishing closure for its lower end which will PXClude superln testimony whercof I hereunto affix my Vposed strata during the introduction of the l signuturc in the prwenco of two Witnesses1 10 `ended box provided with u removable CloboX into position inthe molten bath. this Sth dzly of Marrh. 190).

10. In a galmnlzmg apparatus, an open- AI-AGXANDER NUCDRINGIYIAUS sure for its lower end which will exclude l Wtnesos: Superposed strata durmg the lntroductlon l?. R. (JonNwALL, of the box mto posltxon 1n the molten bath. i IJENoRn (num. 

